Chair



l. PAKSTAS.

SELF LEVELING CHAIR.

APPLICATION FILED MIIY 21. I9I9.

Pateted Nov. 4, 1919.

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sntnnnvnmne CHAIR.

insonne.'

rcitizen of Russia, residing at Harrison,

county of Hudson, and State of New Jersey, have invented certain new anduseful 1mprovements in Self-Leveling Chairs, ofv

' which the following isla specification.

This invention has for its object to vprovide a chair the seat ofwhiohwill maintaina level position irrespective or" the movement Y ofits supports.

This and other objects are attained by the novel construction andcombination of parts hereinafter described and shown in the accompanyingdrawings, forming a material part of this disclosure, and in which-Figure 1 is a top plan view of a chair made in accordance with theinvention, the cover or seat being removed, and

Fig. 2 is a vertical sectional view taken substantially on line 2-2 ofFig. 1.

Referring to the drawings in detail, a stand 10 rests upon integrallyformed supports 11, curved and spread at their feet 12, which may beprovided with casters or spherical contacting elements 13, so that thearticle may be readily moved from place to place as desired.

The upper end of the stand 10 is bell-muzzled outwardly as at 14, andformed integrally therewith are lateral plate extensions 15, disposedover the supports 11.

Secured to the inner smaller art of the frame 10, are brackets 16, fromwhich extend arms 17, converging inward and merging with a hub 18,containing a semi-spherical' recess 19, in its Lupper part, whileextending therebelow 1s a conical opening 20, through which passes a bar2l, having' secured on its lower end a pendulous weight 22, movablefreely between the supports 11.

A spherical element 23 is fixed to the bar 21, the same resting in theseat 19, and is normally drawn downward by the weight 22 and also by theeffect of a coiled compression spring 25, held between a xed collar 26,secured to the bar 21, and a loose washer 27 pressed against the hub 18by the spring. Carried at the upper end of the bar 21 is a plate havingarms 28 held by the nut 29 and engaged at the ends of the arms areforked brackets 30, in which are mounted rollers 31, the same restingupon a washerlike disk 32, the'upper surface of which is substantiallylevel with the hub 18.

' Specification of Letters fatent.

Patented N ov. 4, 1919.

Application filed May 21, 1919. Serial No. 298,727..

The disk 32 is supported upon inturned feet V33, formed with verticallydisposedV rectangular bars 34,'turned horizontally outward at 35, andthen downward at 36, parallel with the. elements 34, and iinally turnedat right angles forming elements 37, having thickened hubs 38, theelements 37 being disposed directly` below the extensions l5 of theframe. Y Y

Secured to the supports 11 are vertical brackets 40, having heads 41, inwhich are semi-spherical recesses 42, `receptive of vthe spheres`43,held in position by the caps 44. Extending rods 45, encircled by thecoils of compression springs 46, abutting against w-ashers 47, looselyencircling the rods at one end, and other washers 48 at the other end,which are held by collars 49 pinned to the lower extremities of the rods45.

Engaged with one of the supports 11 is a foot rest l50, while a back(not shown) may be secured to the chair seat 52, secured to thehorizontal elements 35.

1f the device is to be used as a table only, the foot rest 50 may beomitted and a table top of any desired character applied to the elements35.

1n operation, the parts having been assembled as indicated, if thesupporting surface upon which the terminals 12 rest should be inclinedas for instance the deck of a ship, the weight 22 in maintaining itscenter of gravity directly below the center of the sphere 33, tends tokeep the plate 28 level, causing pressure of the rollers 31 uponv thedisk 32 upon one side or the other, which, being transmitted through theframe elements 34 to 37 inclusive, compresses the springs 46 on the highside of the device, maintaining the seat 52 substantially level,irrespective of the direction in which the supporting surface mayassume.

Having thus described my invention and set forth the manner of itsconstruction, application and use, what I claim as new and desire tosecure by Letters Patent, is-v down from the spheres 43 areV with aseat, a supporting frame therefor,

vand a rigid stand supported upon a Ysurface, of resilient connectionsbetween said stand and said frame, a pendulum, a rod operated thereby, aspider plate carried'at the upper end of said rod, rollers mounted insaid spider plate, and a disk carried by v end of said ban-of a platespider carried on tensions, a hub carried by said stand, said l (hub'having a spherical seat, a sphere restf 1n the seat, a bar iixedinsaidsphere, and

ino' a vbveighted pendulum Yattached to the lower tbe-upper end of saidbar, rollers mounted in the extremities of said plate, a-movable frameresiliently engaged With the extensions oi' said stand, a disk carriedin the inner portion of said movable frame upon which said rollers rest,and a seat carried by said `frame Gop'ies Vof this patent may beobtained for lrest uponV said vdisk` whereby signature.

so as to be maintained substantially level irrespective of tbepositiono'l said stand.

3. In a self leveling chair or the like, the combination with a' `stand,Weight supported tounove universally therein, a frame re'silientlyengagedV with said stand, said frame being adapted to support aseat,aqdisk carried by said ra'ine, 'a spider mounted on tlie suspendingelement Yo1"- said Weiglit, and rollers journaled in saidYspidenadapted'to Weight moves ironia vertical position, said frame is4caused-to yield and Vremain level irrespective of tbe position ofJsaidstand Y ln testimony whereof have aHiXed myV JUsTiNs PAKsTAs.v

ve cents each, by adiressing the Commissioner of Patents. v Washington,D. C. v v

when said

